Description (CNA)
In the Linux kernel, the following vulnerability has been resolved: HID: mcp2221: prevent a buffer overflow in mcp_smbus_write() Smatch Warning: drivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy() '&mcp->txbuf[5]' too small (59 vs 255) drivers/hid/hid-mcp2221.c:388 mcp_smbus_write() error: __memcpy() 'buf' too small (34 vs 255) The 'len' variable can take a value between 0-255 as it can come from data->block[0] and it is user data. So add an bound check to prevent a buffer overflow in memcpy().
Affected (CNA)
| Vendor / product | Versions |
|---|---|
| Linux / Linux | affected 67a95c21463d066060b0f66d65a75d45bb386ffb before 66c8e816f2f2ca4a61b406503bd10bad1b35f72f; affected 67a95c21463d066060b0f66d65a75d45bb386ffb before 91443c669d280937968f0aa4edefa741cfe35314; affected 67a95c21463d066060b0f66d65a75d45bb386ffb before 6402116a7b5ec80fa40fd145a80c813019cd555f; affected 67a95c21463d066060b0f66d65a75d45bb386ffb before 3c0f8a59f2cc8841ee6653399a77f4f3e6e9a270; affected 67a95c21463d066060b0f66d65a75d45bb386ffb before 62ac2473553a00229e67bdf3cb023b62cf7f5a9a |
| Linux / Linux | affected 5.7; unaffected 0 before 5.7; unaffected 5.10.137 through 5.10.*; unaffected 5.15.61 through 5.15.*; unaffected 5.18.18 through 5.18.*; unaffected 5.19.2 through 5.19.*; unaffected 6.0 through * |
CWE
No CWE identifiers supplied.
References
- https://git.kernel.org/stable/c/66c8e816f2f2ca4a61b406503bd10bad1b35f72f
- https://git.kernel.org/stable/c/91443c669d280937968f0aa4edefa741cfe35314
- https://git.kernel.org/stable/c/6402116a7b5ec80fa40fd145a80c813019cd555f
- https://git.kernel.org/stable/c/3c0f8a59f2cc8841ee6653399a77f4f3e6e9a270
- https://git.kernel.org/stable/c/62ac2473553a00229e67bdf3cb023b62cf7f5a9a